A new study from the Karolinska Institutet, in Stockholm, Sweden, shows that vitamin B12 may protect against Alzheimer’s disease, adding more evidence to the scientific debate about whether the vitamin is effective in reducing the risk of memory loss. Having too much homocysteine in the blood, the scientists report, has been linked to negative effects on the brain, such as stroke. Now they suggest that higher levels of vitamin B12 can lower homocysteine levels.

Source: American Academy of Neurology